Miss Kates battery decided to was time to go sleep. #thebigsleep It had fizzled and farted for a couple of months and because she had let it run completely flat a few times, it finally gave up the ghost. So it wont start but has just enough juice to operate the internal electrics and to get it jump started and driven to my place…
The battery in a Porsche Cayenne is cunningly hidden away under the drivers seat – in the traditional place in the front engine compartment there is a + and = terminal that can be used to jump start the vehicle.
I had never changed a Cayenne battery before but decided to video the process after reading the steps on a Forum. It was easy, a little fiddly and took around 15-20 minutes. Now I’ve done it once it would take half that when/if I do it again.
How to replace porsche cayenne battery
Tools: M10 multispline 3/8 socket & ratchet 10mm 3/8 socket 10mm spanner Most Porsche Cayenne 955 (Gen 1) models have a single large battery under the left front seat: that is the passenger seat on a right-hand drive car. The seat base lifts up on a pair of rear-mounted hinges to allow access to the battery box. The multispline M10 bolts which hold the front of the seat frame down are under the two plastic covers in front of the seat: these just clip off to reveal the bolt heads. Undo the bolts and tilt the seat up: hold it up out of the way with a strap to the grab handle if you’re worried. Now you can see the battery cover, which has four clips, one in each corner: undo those and lift the cover off. Your 10mm spanner will undo the terminals (remove earth first), and the 10mm socket will undo the front corner bracket, and the big side clamp holding the battery in place. If you’re worried about losing your radio settings etc, connect a battery charger to the terminals before you unhook them. Once the two clamps are off and the terminals have been detached and secured out of the way, disconnect the small battery vent hose and get the old battery out of there. It is worth cleaning any dirt and dust out of the battery tray before sliding the new battery in.